Roller Coaster Designers

Have you ever had that thought in the back of your head when your watching RCT3/No Limits coasters on Youtube; 'Is there someone out there who is a female rollercoaster designers', now trust me, i've had that in the back of my head for 2 months! And still hav'nt got a clue! Jeez! I think my sis could be a coaster designer on RCT3. Well, if you do know the answer to this random question, comment on this then, I REALLY NEED TO KNOW!!